Capturing Nano‐Scale Inhomogeneity of the Electrode Electrolyte Interface in Sodium‐Ion Batteries Through Tip‐Enhanced Raman Spectroscopy
نویسندگان
چکیده
Abstract A prime challenge in the development of new battery chemistries is fundamental understanding generation electrode–electrolyte interface (EEI) and its evolution upon cycling. Tip‐enhanced Raman spectroscopy (TERS) under an inert gas atmosphere employed to study chemical components anode/cathode electrolyte a sodium‐ion battery. After first cycle, TERS reveals that EEI mostly consists organic carbonate/dicarbonate, oligoethylene oxides, α,β‐unsaturated vinyl ketones/acetates, inorganic species ClO 4 − , 3 Na 2 CO . Whereas after 5× cycling, composition has evolved contain long chain monodentate or bridging/bidentate carboxylates alkoxides. The map nano‐scale heterogeneity present layers elucidates multilayered nano‐mosaic coating structure. sheer volume signature signal can completely unravel mysteries regarding may shed light physicochemical behavior EEI.
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ژورنال
عنوان ژورنال: Advanced Energy Materials
سال: 2023
ISSN: ['1614-6832', '1614-6840']
DOI: https://doi.org/10.1002/aenm.202302176